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Revenues and Deferred Revenue | 12 Months Ended
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Dec. 31, 2019
Disaggregation Of Revenue [Abstract] |
Revenues and Deferred Revenue |
11. | REVENUES AND DEFERRED REVENUE
For the years ended December 31, 2017, 2018 and 2019, all of the Group’s revenues were generated in the PRC, and the disaggregated revenues by types were as follows:
|  | Years ended December 31, |
|  | 2017 |  |  | 2018 |  |  | 2019 |
|  | RMB |  |  | RMB |  |  | RMB |
Disaggregation of revenues |  |  |  |  |  |  |  |  |  |  |  |
Revenue by types: |  |  |  |  |  |  |  |  |  |  |  |
Gross revenues: |  |  |  |  |  |  |  |  |  |  |  |
Degree- or diploma-oriented post-secondary courses |  |  | 822,832 |  |  |  | 1,814,178 |  |  |  | 2,021,990 |
Professional certification preparation and professional skills courses |  |  | 145,840 |  |  |  | 161,366 |  |  |  | 155,370 |
Subtotal Online educational courses |  |  | 968,672 |  |  |  | 1,975,544 |  |  |  | 2,177,360 |
Commissions |  |  | 4,105 |  |  |  | 6,374 |  |  |  | 15,381 |
Others |  |  | 1,901 |  |  |  | 587 |  |  |  | 8,100 |
Total revenues |  |  | 974,678 |  |  |  | 1,982,505 |  |  |  | 2,200,841 |
Less: sales tax and surcharges |  |  | (4,516 | ) |  |  | (8,520 | ) |  |  | (6,939 | )
Total net revenues |  |  | 970,162 |  |  |  | 1,973,985 |  |  |  | 2,193,902 |
The movements of the deferred revenue for the years ended December 31, 2018 and 2019 were as follows (1):
|  | As of December 31, |
|  | 2018 |  |  | 2019 |
|  | RMB |  |  | RMB |
Beginning balance (current and noncurrent) |  |  | 2,110,428 |  |  |  | 3,286,025 |
Additions |  |  | 3,214,400 |  |  |  | 2,236,638 |
Deductions |  |  | (2,038,803 | ) |  |  | (2,293,893 | )
Ending balance (current and noncurrent) |  |  | 3,286,025 |  |  |  | 3,228,770 |
Deferred revenue, current |  |  | 1,765,085 |  |  |  | 1,670,076 |
Deferred revenue, non-current |  |  | 1,520,940 |  |  |  | 1,558,694 |
| (1) | Amounts presented are inclusive of VAT (see VAT in Note 2).
Deferred revenue primarily consists of educational service fees received from customers for which the Group’s revenue recognition criteria have not been met. Deferred revenue balance will be recognized as revenue once the criteria for revenue recognition are met. The current portion of deferred revenue as of January 1, 2018 and January 1, 2019 were substantially all recognized as revenue during the years ended December 31, 2018 and 2019, respectively. The Group’s remaining performance obligations, representing the amount of the transaction price for which service has not been provided, is substantially included in the deferred revenue account on the consolidated financial statements and the related disclosures. As of December 31, 2019, the deferred revenue balance is RMB3,228,770, of which RMB1,670,076 and RMB1,199,727 will be recognized as revenue over the next 12 and 24 months, respectively, with the remainder of RMB358,967 recognized thereafter.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 + Details
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